Hey
Haven't seen you before
Baltimore here.
Have you upgraded the esc and motor combo?
I believe stock is a 2 in 1 ESC and Receiver which can only work with the Traxxas remotes.
In order to use a Spektrum, you would need to get rid of the 2 in 1 and get a esc sperately from the receiver.
Or you can get a 2 in 1 Spektrum esc and receiver that comes in most of the Horizon mini RTRs, but they only work with those RTR radios.
For the Losi Mini LMT, its a Spektrum 2 in 1 , brushed esc, only works with the SLT2 transmitter.
Can't find much for Spektrum Surface micro receivers.
Do you already have a Spektrum radio? If so which model?